Patent · US Expired

Aluminofluorosilicate glass

US6107229A · kind A · utility

9Cited by

6References

8Claims

0Family size

Assignee

Ernst Muehlbauer GmbH & Co. KG · DE

Inventors

Rainer Luck · Tornesch, DE
Dieter Reif · Altendambach, DE
Barbara Leuner · Ilmenau, DE

Key dates

Filing date	Jun 19, 1998
Grant date	Aug 22, 2000
Priority date	—
Expiry date	Jun 19, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C4/0021
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention relates to an aluminofluorosilicate glass for use in a material for dental restoration, which has the following features: PA1 a) a ratio of Al (calculated as Al.sub.2 O.sub.3) to Si (calculated as SiO.sub.2) of 0.57-1.12 by mass; PA1 b) a total content of Mg (calculated as MgO) and Ba (calculated as BaO) of 29-36% by mass; PA1 c) a ratio of Mg (calculated as MgO) to Ba (calculated as BaO) of 0.028-0.32 by mass; PA1 d) a content of P (calculated as P.sub.2 O.sub.5) of 2-10% by mass. The glass according to the invention has a high radiopacity, and the refractive index n.sub.D for visible light can be adjusted by varying the phosphorus content.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.